Cardinals defensive linemen Frostee Rucker (92) and Cory Redding (90) watch over defensive line work during Wednesday's practice, for which they were excused.

Bruce Arians' decision to give guys with at least 10 years in the league an off day Wednesday was "joyous," quarterback Carson Palmer said.

It didn't hurt that Palmer was one of the lucky ones.

Palmer, long snapper Mike Leach, punter Dave Zastudil, linebacker Lorenzo Alexander, wide receiver Larry Fitzgerald and defensive linemen Cory

Redding and Frostee Rucker were those who qualified, although Leach and Zastudil ended up practicing.

"That's the first time he's done that, and guys understand it's not a mess-around session," Palmer said. "If he's going to do that, you better handle it the right way. You turn into coaches almost, helping the young guys along, and not standing in the back, squirting each other with Gatorade.

"He wouldn't do that if he didn't think we were mature enough to handle it."

Redding smiled at Palmer's explanation, noting it was indeed "joyful" to get the news. Redding was already on his way to alternate between short sessions in the hot and cold tub, planning on an ultrasound later in the day and the need to elevate his legs.

With the Cardinals still installing plays, Redding said it was imperative for vets to stay mentally engaged, in addition to helping young players who now can get some extra reps.

"The boys don't complain, we keep our head down and keep pushing," Redding said. "That's what training camp is about, to weed out the weak and make the strong stronger, so you can have the best 53 men, warriors, you can have.

"But even some warriors need some rest."

IUPATI COULD BE SIDELINED; PETERS CARTED OFF

At lunchtime, Arians said starting left guard Mike Iupati, who left Tuesday's practice early after hurting his left knee, would be getting further tests. In the middle of Wednesday's practice, ESPN reported Iupati would "likely" need

arthroscopic surgery and could be out 6-to-8 weeks. There was no official word from the team, and none was expected before Arians addressed the media Thursday.

It wasn't the only important injury news coming out of practice. Defensive tackle Corey Peters went down on one of the first plays of 11-on-11. Initially helped off the field, Peters eventually limped the rest of the way to the sideline before trainers looked at his lower left leg or ankle. Peters eventually climbed in a cart and rode to the locker room. Peters tore his right Achilles late in the 2013 season.

Sitting out practice were LB Sean Weatherspoon (hamstring), LB Shaq Riddick (hamstring), T Rob Crisp (knee), CB Jonte Green (hamstring) and WR Michael Floyd (hand). CB Jerraud Powers (oblique) was limited.

ARIANS: COACHES SHOULD CONTROL FIGHTING

With another fight at a joint practice between the Rams and Cowboys, Arians – who has never made any secret of his disdain for fighting on the field – was blunt in saying the coaches should be able to eliminate those problems.

"There's no place in the game for it," Arians said. "Coaches that believe it that, they need to get new jobs."

Arians said of all the joint practices he's been a part of in his life fighting has only come up a time or two.

"It's up to the coaches to make sure that stuff doesn't happen," Arians said. "I'll bet my life there won't be one with New England and New Orleans, because coaches won't allow it. Other coaches breed it."